Japanese video panty game

Yes, a Japanese video game in which little girls fight each other and where your opponent's damage wears off, unless you are able to take a photograph of her panties. The Japanese have an obsession with panties as you can see from this review of anime with a storyline centered around it, the vending machines selling used panties, where upskirt photography keeps women -- girls! -- in a condition of perpetual passive-aggressive rape.